Wheels Manufacturing 386Evo-Shim/SRAM
386Evo-Shim/SRAM
Wheels Manufacturing

Wheels Manufacturing 386Evo-Shim/SRAM

In Stock

Lightweight Delrin sleeve adapters that convert BB386EVO frames for 24mm Shimano cranks or 22/24mm SRAM GXP cranks. Includes precision 0.7mm spacers for exact preload and quiet operation.

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Available Options

Option Price Availability
Wheels Manufacturing, 386 Evo to Shimano 24mm adapter, 386EVO-SHIM — In Stock
Wheels Manufacturing, 386 Evo to SRAM 22/24mm adapter, 386EVO-SRAM — In Stock

Product Details

Overview & Technology

Wheels Manufacturing 386Evo adapters are precision-molded Delrin sleeves designed to convert BB386EVO press-fit frames to accept common 24mm Shimano spindles or the mixed 22/24mm spindle of SRAM GXP. The adapters come in two variants: the 386EVO-SHIM (two 24mm ID adapters) and the 386EVO-SRAM (one 24mm right-side adapter and one 22mm left-side adapter). Material choice matters: Delrin (acetal) offers excellent dimensional stability, low friction and good wear resistance against sealed cartridge bearings and aluminium shell bores. At just ~48g per pair, these adapters add minimal weight while delivering a tight, creak-resistant interface between crank spindle and frame.

Key Features

What's in the box: 386EVO-SHIMANO ships with 2 x 24mm ID adapters + 8 x 0.7mm spacers. 386EVO-SRAM ships with 1 x 24mm ID (right), 1 x 22mm ID (left) + 8 x 0.7mm spacers. Each pair weighs about 48g. • Delrin construction — low friction, durable, and vibration-damping. • Precision ID — accurate 24mm and 22mm diameters for tight bearing/crank fits. • Fine adjustment spacers — eight 0.7mm shims let you dial crank preload and chainline exactly. • Simple press-fit installation — press into BB386EVO shells for a reliable fit; use a bearing press or appropriate drift.

Fit & Compatibility

These adapters are specifically made for frames with a BB386EVO shell. They convert the BB shell to accept cranksets using a 24mm spindle (Shimano Hollowtech II, many road/gravel cranks) or SRAM GXP-style 22/24mm spindles (SRAM option). They do not include bearings — you'll still need the correct sealed cartridge bearings for your shell and spindle combination. Before ordering, confirm your frame is BB386EVO and check your crank spindle diameter. If you run SRAM GXP, choose the 386EVO-SRAM variant (22/24mm). For Shimano/other 24mm spindles, choose the 386EVO-SHIM variant (two 24mm adapters).

Who It's For

This adapter set is ideal for road and gravel riders upgrading or swapping cranksets on BB386EVO frames who want a lightweight, low-noise solution. It's a great choice for mechanics, home wrenchers and frame builders who need a reliable, serviceable conversion without custom machining. If you run integrated 24mm Shimano cranks or SRAM GXP cranks on a BB386EVO frame and want crisp bearing alignment with a low-creak interface, these Delrin adapters are a practical, durable option.

Key Features

  • ✓ Convert BB386EVO shell to accept 24mm Shimano spindles
  • ✓ SRAM variant supports mixed 22mm/24mm GXP spindle configuration
  • ✓ Delrin (acetal) construction for low friction and durability
  • ✓ Includes eight 0.7mm spacers for precise preload adjustment
  • ✓ Lightweight pair at approximately 48g total
  • ✓ Simple press‑fit installation — bearing press recommended
  • ✓ Not a bearing — pairs with correct sealed cartridge bearings

Specifications

BB Shell Type BB386EVO
Crank Spindle Diameter 24mm

Product Identifiers

Vendor Item # 386EVO-SHIM
UPC 836572007945

Frequently Asked Questions

Which variant do I need for my crank?

If your crank uses a 24mm spindle (Shimano Hollowtech II and many road cranks), choose 386EVO‑SHIM. If you have SRAM GXP (22mm left, 24mm right), choose 386EVO‑SRAM. Confirm your crank spindle diameters before purchase.

Do these adapters include bearings?

No. The adapters are Delrin sleeves that resize the BB386EVO shell inner diameter. You'll still need the correct sealed cartridge bearings for the chosen spindle diameter and shell.

Can I install these without special tools?

A bearing press or adapter-specific press tool is recommended for a clean, square installation. You can use a mallet and protective drift in a pinch, but improper installation risks damage or misalignment.

What do the 0.7mm spacers do?

The eight 0.7mm spacers let you fine-tune crank preload and achieve correct chainline. They are thin shims placed between adapter and bearing or between adapter faces as needed during setup.

Will these fit PF30 or BB30 frames?

No. These are engineered specifically for BB386EVO shell dimensions. PF30/BB30 have different diameters and require different adapters or bearings.

How much do the adapters weigh?

The paired set weighs approximately 48 grams, making them a lightweight conversion option for road and gravel builds.

Buying Guide

When choosing a BB386EVO adapter, start by identifying your crank spindle diameter — 24mm for most Shimano-style cranks, 22/24mm for SRAM GXP. Pick the matching Wheels Manufacturing variant (386EVO‑SHIM for dual 24mm, 386EVO‑SRAM for 22/24mm). Consider whether you already have compatible sealed bearings; adapters do not replace bearings. Material and tolerance are key: Delrin sleeves give a snug, low-noise interface and are forgiving compared with hard aluminium sleeves. If you plan to swap cranksets often, keep the 0.7mm spacers handy to restore correct preload and chainline quickly.

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